| 摘要 |
<p>PROBLEM TO BE SOLVED: To make unnecessary a power supply dedicated for a power control unit.SOLUTION: In an electronic apparatus connectable of a plurality of batteries, to a power supply for a power control unit for determining to select a battery and for switching over a switch, a connection is made through a diode from each battery. Also, a connection is made through a diode from a power supply obtained by raising an output voltage of the selected battery. Thus, at activation, power is supplied to a power supply unit either directly from the battery before the battery selection, or by raising the output voltage of the selected battery after the battery selection.</p> |
